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  3. beer is to be pumped from a fermenting vessel to a

Beer is to be pumped from a fermenting vessel to a racking tank at a velocity...

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Mechanical Engineering

Beer is to be pumped from a fermenting vessel to a racking tankat a velocity of 1.5 m/s through a 100 mm ID pipe, having anabsolute roughness of 0.05 mm. The total length of the pipe,allowed for fitting and valves is equivalent to 10 m on the suctionside of the pump and 60 m on the delivery. The pump is situated at3 m below the constant level of beer in the fermenting vessel,which is at atmospheric pressure. Beer is discharged at the level15 m above the pump in the racking tank. The pressure at thedelivery point is 200kPa. The pump efficiency is 60%.

Make appropriate assumption and calculate the total head to bedeveloped by the pump, its size and its required NPSH.

Given: beer viscosity = 0.001 Pa.s, beer density = 1.010 kg/l,vapour pressure = 2.3 kPa

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